OpenAI to watermark AI-generated text in EU, but detection has limits

OpenAI has announced its approach to text watermarking under the EU AI Act, saying it will use an invisible statistical watermark to help identify text generated by its models. The company said on October 5 that it will begin adding the watermark to eligible ChatGPT and Codex text outputs in the European Union over the coming weeks. It will also let API customers globally opt in to watermarking for select models, while keeping the feature off by default.